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Multi-layer microfluidic glass chips for microanalytical applications.

A Daridon1, V Fascio, J Lichtenberg

  • 1Institute of Microtechnology, University of Neuchâtel, Switzerland.

Fresenius' Journal of Analytical Chemistry
|October 27, 2001
PubMed
Summary
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This study introduces a novel glass microfluidic device architecture for corrosive reagents. The new design enhances concentration sensitivity for flow-injection analysis, offering a versatile alternative to silicon-based systems.

Area of Science:

  • Microfluidics
  • Materials Science
  • Analytical Chemistry

Background:

  • Silicon microfluidic devices are limited by reagent compatibility.
  • Corrosive reagents necessitate alternative materials for microfluidic systems.

Purpose of the Study:

  • To present a versatile, all-glass microfluidic device architecture.
  • To demonstrate enhanced performance for analytical applications using this new design.

Main Methods:

  • Three-layer glass wafer fusion bonding.
  • Photolithography and wet chemical etching for channel fabrication.
  • Spark-assisted etching (SAE) for low dead-volume connections and optical cuvettes.

Main Results:

  • The glass device achieved higher concentration sensitivity for ammonia analysis compared to silicon devices.

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  • SAE proved effective for fabricating integrated optical cuvettes with long path lengths.
  • The device architecture is suitable for applications like organic synthesis (Wittig reaction).

    • Conclusions:

    • The all-glass microfluidic architecture offers a robust and sensitive platform for handling corrosive reagents.
    • Spark-assisted etching is a valuable technique for advanced microfluidic device fabrication.
    • This technology enables improved analytical detection and facilitates microscale chemical synthesis.